Oven stone



FIG. 1 is a perspective view of an oven stone;

FIG. 2 is a bottom plan view of the oven stone of FIG. 1;

FIG. 3 is a back elevation view of the oven stone of FIG. 1;

FIG. 4 is a top plan view of the oven stone of FIG. 1;

FIG. 5 is a front elevation view of the oven stone of FIG. 1; and,

FIG. 6 is a side elevation view of the oven stone of FIG. 1.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for an oven stone, as shown and described. 